The ASTM C518-21 standard, established by the American Society for Testing and Materials (ASTM), provides a scientific framework for evaluating XPE thermal insulation through the steady-state heat flow method. SGS-certified testing of Guangzhou Landy’s "pure aluminum + XPE + pure aluminum" composite (5mm and 10mm thickness) quantifies its thermal performance, forming a reliable basis for real-world applications.

Key ASTM Certification Metrics

Under ASTM C518-21 testing at 50°C average temperature and 20°C temperature difference:

· 5mm thickness: Thermal conductivity of 0.041 W/(m·K) and thermal resistance of 0.122 (m2·K)/W.

· 10mm thickness: Thermal conductivity of 0.043 W/(m·K) and thermal resistance of 0.231 (m2·K)/W.
Results show linear correlation between thickness and thermal resistance, guiding engineering design for thickness selection. Densities of 53.5 kg/m3 (5mm) and 43.6 kg/m3 (10mm) highlight lightweight efficiency, meeting low-density insulation needs.

Diverse Applications

1. Building Energy Efficiency: Green Enclosure Systems
Replacing traditional materials like rock wool and EPS, XPE insulation reduces indoor-outdoor heat transfer via low thermal conductivity. In hot-summer/cold-winter regions, 5mm thickness lowers air conditioning loads by 15–20% for wall insulation; 10mm thickness, combined with aluminum foil’s reflective properties, reduces roof inner surface temperatures by 8–10°C, enhancing comfort and energy savings.

2.Cold Chain Logistics: Precise Temperature Control
For refrigerated trucks, cold storage, and insulated containers, XPE-aluminum composite minimizes cold loss by 15%, critical for temperature-sensitive goods like pharmaceuticals and fresh produce. Its flexibility adapts to complex geometries, reducing installation waste.

3.Industrial Equipment Insulation: Energy Efficiency & Safety
In chemical and power industries, XPE with aluminum foil protects pipelines, tanks, and kilns from heat loss and scald risks. The moisture-proof, corrosion-resistant surface suits high-humidity or corrosive environments.

ASTM certification serves as both a technical compliance mark and a gateway to global markets. By optimizing material formulations (density, composite structure), Guangzhou Landy develops application-specific products, closing the loop from material performance to engineering implementation.